Alright, let's solve this math problem step by step. First, we have the number 789. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 215. So, we're going to take the number 789 and add it to itself 215 times.
Step 1: 0 + 789 = 789
Step 2: 789 + 789 = 1578
Step 3: 1578 + 789 = 2367
Step 4: 2367 + 789 = 3156
Step 5: 3156 + 789 = 3945
Step 6: 3945 + 789 = 4734
Step 7: 4734 + 789 = 5523
Step 8: 5523 + 789 = 6312
Step 9: 6312 + 789 = 7101
Step 10: 7101 + 789 = 7890
Step 11: 7890 + 789 = 8679
Step 12: 8679 + 789 = 9468
Step 13: 9468 + 789 = 10257
Step 14: 10257 + 789 = 11046
Step 15: 11046 + 789 = 11835
Step 16: 11835 + 789 = 12624
Step 17: 12624 + 789 = 13413
Step 18: 13413 + 789 = 14202
Step 19: 14202 + 789 = 14991
Step 20: 14991 + 789 = 15780
Step 21: 15780 + 789 = 16569
Step 22: 16569 + 789 = 17358
Step 23: 17358 + 789 = 18147
Step 24: 18147 + 789 = 18936
Step 25: 18936 + 789 = 19725
Step 26: 19725 + 789 = 20514
Step 27: 20514 + 789 = 21303
Step 28: 21303 + 789 = 22092
Step 29: 22092 + 789 = 22881
Step 30: 22881 + 789 = 23670
Step 31: 23670 + 789 = 24459
Step 32: 24459 + 789 = 25248
Step 33: 25248 + 789 = 26037
Step 34: 26037 + 789 = 26826
Step 35: 26826 + 789 = 27615
Step 36: 27615 + 789 = 28404
Step 37: 28404 + 789 = 29193
Step 38: 29193 + 789 = 29982
Step 39: 29982 + 789 = 30771
Step 40: 30771 + 789 = 31560
Step 41: 31560 + 789 = 32349
Step 42: 32349 + 789 = 33138
Step 43: 33138 + 789 = 33927
Step 44: 33927 + 789 = 34716
Step 45: 34716 + 789 = 35505
Step 46: 35505 + 789 = 36294
Step 47: 36294 + 789 = 37083
Step 48: 37083 + 789 = 37872
Step 49: 37872 + 789 = 38661
Step 50: 38661 + 789 = 39450
Step 51: 39450 + 789 = 40239
Step 52: 40239 + 789 = 41028
Step 53: 41028 + 789 = 41817
Step 54: 41817 + 789 = 42606
Step 55: 42606 + 789 = 43395
Step 56: 43395 + 789 = 44184
Step 57: 44184 + 789 = 44973
Step 58: 44973 + 789 = 45762
Step 59: 45762 + 789 = 46551
Step 60: 46551 + 789 = 47340
Step 61: 47340 + 789 = 48129
Step 62: 48129 + 789 = 48918
Step 63: 48918 + 789 = 49707
Step 64: 49707 + 789 = 50496
Step 65: 50496 + 789 = 51285
Step 66: 51285 + 789 = 52074
Step 67: 52074 + 789 = 52863
Step 68: 52863 + 789 = 53652
Step 69: 53652 + 789 = 54441
Step 70: 54441 + 789 = 55230
Step 71: 55230 + 789 = 56019
Step 72: 56019 + 789 = 56808
Step 73: 56808 + 789 = 57597
Step 74: 57597 + 789 = 58386
Step 75: 58386 + 789 = 59175
Step 76: 59175 + 789 = 59964
Step 77: 59964 + 789 = 60753
Step 78: 60753 + 789 = 61542
Step 79: 61542 + 789 = 62331
Step 80: 62331 + 789 = 63120
Step 81: 63120 + 789 = 63909
Step 82: 63909 + 789 = 64698
Step 83: 64698 + 789 = 65487
Step 84: 65487 + 789 = 66276
Step 85: 66276 + 789 = 67065
Step 86: 67065 + 789 = 67854
Step 87: 67854 + 789 = 68643
Step 88: 68643 + 789 = 69432
Step 89: 69432 + 789 = 70221
Step 90: 70221 + 789 = 71010
Step 91: 71010 + 789 = 71799
Step 92: 71799 + 789 = 72588
Step 93: 72588 + 789 = 73377
Step 94: 73377 + 789 = 74166
Step 95: 74166 + 789 = 74955
Step 96: 74955 + 789 = 75744
Step 97: 75744 + 789 = 76533
Step 98: 76533 + 789 = 77322
Step 99: 77322 + 789 = 78111
Step 100: 78111 + 789 = 78900
Step 101: 78900 + 789 = 79689
Step 102: 79689 + 789 = 80478
Step 103: 80478 + 789 = 81267
Step 104: 81267 + 789 = 82056
Step 105: 82056 + 789 = 82845
Step 106: 82845 + 789 = 83634
Step 107: 83634 + 789 = 84423
Step 108: 84423 + 789 = 85212
Step 109: 85212 + 789 = 86001
Step 110: 86001 + 789 = 86790
Step 111: 86790 + 789 = 87579
Step 112: 87579 + 789 = 88368
Step 113: 88368 + 789 = 89157
Step 114: 89157 + 789 = 89946
Step 115: 89946 + 789 = 90735
Step 116: 90735 + 789 = 91524
Step 117: 91524 + 789 = 92313
Step 118: 92313 + 789 = 93102
Step 119: 93102 + 789 = 93891
Step 120: 93891 + 789 = 94680
Step 121: 94680 + 789 = 95469
Step 122: 95469 + 789 = 96258
Step 123: 96258 + 789 = 97047
Step 124: 97047 + 789 = 97836
Step 125: 97836 + 789 = 98625
Step 126: 98625 + 789 = 99414
Step 127: 99414 + 789 = 100203
Step 128: 100203 + 789 = 100992
Step 129: 100992 + 789 = 101781
Step 130: 101781 + 789 = 102570
Step 131: 102570 + 789 = 103359
Step 132: 103359 + 789 = 104148
Step 133: 104148 + 789 = 104937
Step 134: 104937 + 789 = 105726
Step 135: 105726 + 789 = 106515
Step 136: 106515 + 789 = 107304
Step 137: 107304 + 789 = 108093
Step 138: 108093 + 789 = 108882
Step 139: 108882 + 789 = 109671
Step 140: 109671 + 789 = 110460
Step 141: 110460 + 789 = 111249
Step 142: 111249 + 789 = 112038
Step 143: 112038 + 789 = 112827
Step 144: 112827 + 789 = 113616
Step 145: 113616 + 789 = 114405
Step 146: 114405 + 789 = 115194
Step 147: 115194 + 789 = 115983
Step 148: 115983 + 789 = 116772
Step 149: 116772 + 789 = 117561
Step 150: 117561 + 789 = 118350
Step 151: 118350 + 789 = 119139
Step 152: 119139 + 789 = 119928
Step 153: 119928 + 789 = 120717
Step 154: 120717 + 789 = 121506
Step 155: 121506 + 789 = 122295
Step 156: 122295 + 789 = 123084
Step 157: 123084 + 789 = 123873
Step 158: 123873 + 789 = 124662
Step 159: 124662 + 789 = 125451
Step 160: 125451 + 789 = 126240
Step 161: 126240 + 789 = 127029
Step 162: 127029 + 789 = 127818
Step 163: 127818 + 789 = 128607
Step 164: 128607 + 789 = 129396
Step 165: 129396 + 789 = 130185
Step 166: 130185 + 789 = 130974
Step 167: 130974 + 789 = 131763
Step 168: 131763 + 789 = 132552
Step 169: 132552 + 789 = 133341
Step 170: 133341 + 789 = 134130
Step 171: 134130 + 789 = 134919
Step 172: 134919 + 789 = 135708
Step 173: 135708 + 789 = 136497
Step 174: 136497 + 789 = 137286
Step 175: 137286 + 789 = 138075
Step 176: 138075 + 789 = 138864
Step 177: 138864 + 789 = 139653
Step 178: 139653 + 789 = 140442
Step 179: 140442 + 789 = 141231
Step 180: 141231 + 789 = 142020
Step 181: 142020 + 789 = 142809
Step 182: 142809 + 789 = 143598
Step 183: 143598 + 789 = 144387
Step 184: 144387 + 789 = 145176
Step 185: 145176 + 789 = 145965
Step 186: 145965 + 789 = 146754
Step 187: 146754 + 789 = 147543
Step 188: 147543 + 789 = 148332
Step 189: 148332 + 789 = 149121
Step 190: 149121 + 789 = 149910
Step 191: 149910 + 789 = 150699
Step 192: 150699 + 789 = 151488
Step 193: 151488 + 789 = 152277
Step 194: 152277 + 789 = 153066
Step 195: 153066 + 789 = 153855
Step 196: 153855 + 789 = 154644
Step 197: 154644 + 789 = 155433
Step 198: 155433 + 789 = 156222
Step 199: 156222 + 789 = 157011
Step 200: 157011 + 789 = 157800
Step 201: 157800 + 789 = 158589
Step 202: 158589 + 789 = 159378
Step 203: 159378 + 789 = 160167
Step 204: 160167 + 789 = 160956
Step 205: 160956 + 789 = 161745
Step 206: 161745 + 789 = 162534
Step 207: 162534 + 789 = 163323
Step 208: 163323 + 789 = 164112
Step 209: 164112 + 789 = 164901
Step 210: 164901 + 789 = 165690
Step 211: 165690 + 789 = 166479
Step 212: 166479 + 789 = 167268
Step 213: 167268 + 789 = 168057
Step 214: 168057 + 789 = 168846
Step 215: 168846 + 789 = 169635

So, 789*215 = 169635